NCHMCT JEE 2012 Question Paper with solutions for online practice

Question : 7 of 200

Marks: +1, -0

The area of a rectangular field is 460 square metres. If the length is 15 per cent more than the breadth, what is breadth of the rectangular field?

Solution:

Let the breadth of rectangular field be x metres
∴ Length = x ×

{115}/{100}

{23x}/{20}

metres
Now, Length × Breadth = Area
⇒

{23x}/{20}

× x × 460
⇒

x^2

{460×20}/{23}

⇒

x^2

= 20 × 20
⇒ x =

√{20×20}

= 20 metres

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